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ie, if I want to charge my iPad faster, I assume a 12 watt charger will be faster than a 5, but if I use a different cable (I need a long cable), will it slow it down? Does the cable itself contain a wattage, or only the charger plug itself? Thanks.

The iPad has a new 12W USB Power adapter and the older 10W is no longer available. I used to charge my iPhone with the 10W adapter but it somehow the adapter has conked (it fell down twice). I just want to know if i purchase the 12W adpater, will it work for my iPhone 4?

I was wondering how much faster the 12W charger is in charging the iPad 4th generation, 128GB versus using the 10W charger. Is there a significant difference. I have a few 10W and I'm wondering if I should replace them with 12W chargers. Thanks! :)

I want to use the cord from the 10W adapter I had with my iPad 3 with the new 12W adapter I got with my iPad 4. I assume all the electronics that make it 12W are in the main body of the power adapter, not in the small section that slides onto it. The main parts of the adapters are the only parts that say anything about 10W or 12W. I noticed the little slide-on plug sections all say "2.5A 125V" regardless of when they were made, the one from my iPad 1 says the same thing as the one from my iPad 4. So I'm 99% sure I can connect the 12W adapter to an older cable or older plug and it won't make a difference and will still charge at 12W. I just want to have this confirmed.